KR20230080649A - Detachable structure of the space keeping device for formwork - Google Patents

Abstract

The present invention relates to a detachable structure of a mold spacer, which is configured to simultaneously separate a plurality of spacers by means of elastic force of a clockwork spring and a wire connected to a tower crane. At a shaft rod to which a cone nut is coupled, a female screw unit is formed on the inner circumferential surface such that a tie bolt may be screw-coupled. Coupled to the outer circumferential surface of the shaft rod are a wire, which is fixed at an elevating member elevated by means of a tower crane, and a clockwork spring, which is formed in a spiral shape to provide elastic force by means of extension. When the elevating member ascends, the wire is pulled such that the clockwork spring is compressed, causing the shaft rod to be rotated in the anti-clockwise direction to separate the tie bolt. When the elevating member descends, the wire is loosened such that the clockwork spring may be extended, causing the shaft rod to be reversely rotated in the clockwise direction to be converted into a standby state for the coupling with the tie bolt. Therefore, according to the detachable structure of a mold spacer of the present invention, the shaft rod may be rotated by the control of the wire and the elastic force of the clockwork spring, such that the tie bolt may be simply separated. Consequently, the worker is not required to individually release the spacer on the outer wall of a high-rise building, thereby preventing safety accidents caused by falling. Furthermore, by means of the control of the elevation of the elevating member by using the tower crane, the plurality of spacers may be simultaneously disassembled, thereby significantly reducing the working time and thus increasing economic feasibility.

Description

Detachable structure of the space keeping device for formwork}

The present invention relates to a formwork spacer installed to prevent the gap between the inner formwork and the outer formwork from widening due to the pressure caused by the curing of concrete, and more particularly, the elastic force of the wire connected to the tower crane and the main spring. It relates to a detachable structure of a spacer for formwork that can prevent a safety accident due to a fall by configuring a plurality of spacers to be separated at the same time, and can drastically reduce work time.

In general, when a reinforced concrete building is newly built, a skeleton is formed by placing reinforcement, and after installing formwork on the inside and outside of the skeleton, concrete is poured and cured for a certain period of time. At this time, the conventional formwork not only takes a lot of time to manufacture due to the use of wooden panels, but also has a problem in that most of the formwork is damaged in the process of removing the formwork after the concrete curing is finished and cannot be reused, and a separate formwork is required for building exterior construction. There are problems such as having to install scaffolding.

Accordingly, in recent years, a large exterior wall formwork (commonly referred to as gang form and euro form, hereinafter abbreviated as formwork) installed outside the building during concrete pouring has been developed and is essential for new construction of high-rise buildings. The inner and outer forms of such a large outer wall formwork are prevented from widening due to the pressure of the concrete being embedded by installing a spacer in the space between them.

Accordingly, in Utility Model Registration No. 20-0430888, the applicant of the present application forms a support member on the bracket to prevent the axis of the shaft rod from being twisted due to external pressure, and the hook is detachably configured to make installation and disassembly easier. And, by providing a coupling means for fixing the cone nut to the shaft rod, a gap holder for formwork to prevent the loosening of the cone nut has been proposed.

However, these conventional spacers for formwork have a risk of falling because the operator has to separate the spacers directly coupled with the tie bolts from the outer wall of the high-rise building, as well as using a large number of spacers with tools. There was a problem that a lot of work time was required because it had to be separated.

The present invention is to solve the above problems, and provides a detachable structure of spacers for formwork that can prevent safety accidents due to falls without requiring workers to separate the spacers directly from the outer wall of a high-rise building. has its purpose.

In addition, another object of the present invention is to provide a detachable structure of a spacer for formwork that can shorten the working time by dismantling a plurality of spacers at the same time using a tower crane.

In the detachable structure of the spacer for formwork according to the present invention, a female screw portion is formed on the inner circumferential surface so that the tie bolt can be screwed to the shaft bar to which the cone nut is coupled, and the outer circumferential surface of the shaft bar is fixed to an elevating member that is lifted by a tower crane. The wire is coupled with a spiral spring configured to exert an elastic force by expansion, and when the elevating member rises, the spring is compressed due to the pulling of the wire, and the tie bolt is separated as the shaft rotates counterclockwise. And, when the elevating member descends, the mainspring spring is expanded by the loose wire, and the shaft rod reversely rotates in a clockwise direction to switch to a standby state for engagement with the tie bolt.

According to the detachable structure of the spacer for formwork according to the present invention, it is configured to separate the tie bolt by rotating the shaft bar by the manipulation of the wire and the elastic force of the spring, so that the operator can release the spacer from the outer wall of the high-rise building. There is no need for it, so there is an effect of preventing safety accidents caused by falls.

In addition, it is configured to dismantle a plurality of spacers at the same time by an operation of elevating the elevating member using a tower crane, so that the working time can be drastically reduced, resulting in a more economical effect.

1 is a perspective view of a spacing tool for formwork according to the present invention;
Figure 2 is a perspective view showing an embodiment of the shaft rod according to the present invention
Figure 3 is a side cross-sectional view showing the coupled state of the spacing holder for formwork according to the present invention;
Figure 4 is a planar cross-sectional view in which the spacer for formwork according to the present invention is separated from the tie bolt;
5 is a front view of a tower crane equipped with a spacer for formwork according to the present invention;
6 is a planar cross-sectional view showing a separated state of the spacing holder for formwork according to the present invention;
Figure 7 is a planar cross-sectional view in which the spacer for formwork of the present invention is fixed to tie bolts;
Figure 8 is a planar cross-sectional view showing a coupled state of the spacing tool for formwork according to the present invention.
Figure 9 is a perspective view showing another embodiment of the shaft rod according to the present invention.

A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the spacer for formwork according to the present invention is provided with a bracket 20 made of a metal plate, and an installation portion 21 made of a shape of 'c' is coupled to the front surface of the metal plate by welding. In the installation part 21, a cutout 22 is formed so that the wire 60 can be drawn upward.

The bracket 20 and the installation part 21 are installed so that the shaft bar 30 can rotate and move back and forth through holes respectively formed in the center, and the shaft bar 30 drawn out toward the bracket 20 has a hexagonal shape. A head portion 31 is formed, and a ring-shaped washer 32 is coupled to the head portion 31 by welding.

A female screw portion 33 is formed on the inner circumferential surface of the shaft rod 30 drawn out to the outside of the installation portion 21, and the outer circumferential surface of the shaft rod 30 is coupled so that the cone nut 40 can rotate, and the installation Inside the part 21, a main spring 50 made of metal is installed.

The main spring 50 is a spring formed in a spiral shape to exert elasticity by using a thin and thin strip-shaped metal plate. It is configured so that it can be used as

As an embodiment of the present invention, the inner end of the mainspring 50 is inserted into the guide groove 37 of the fixing member 36 coupled to the shaft rod 30 with bolts, and the outer end of the mainspring 50 is By being fixed to the fixing bolt 51 coupled to the installation portion 21, the shaft rod 30 is configured to rotate by elastic force.

On the outer circumferential surface of the shaft rod 30, as shown in FIG. 2, a seating portion 35 cut to the center line is formed in the longitudinal direction, and a fixing member 36 having a semicircular cross section is formed on the seating portion 35. The inner end of the main spring 50 is inserted into the guide groove 37 formed in the longitudinal direction of the fixing member 36 and coupled by a bolt.

By this combination, the main spring 50 maintains its original position, and the shaft rod 30 rotates along the guide groove 37 by the elastic restoring force of the main spring 50 and can move back and forth.

On the outer circumferential surface of the shaft bar 30, a wire 60 drawn into the cutout 22 is fixed by a bolt. It can be compressed or expanded.

As shown in FIG. 3, the spacer of the present invention is installed on the formwork to maintain the distance between the outer formwork 3 and the inner formwork 4 from expansion due to curing of concrete.

A plurality of horizontal frames 2 are coupled to the outside of the outer formwork 3 at intervals up and down, and a plurality of vertical frames 1 are coupled at intervals left and right outside the horizontal frame 2, There, a tie bolt 10 is installed between the outer formwork 3 and the inner formwork 4, and a fixing pin 5 is coupled to the tie bolt 10 drawn out to the outside of the inner formwork 4. do.

The spacer is installed so that the bracket 20 is in close contact with the upper side of the pair of vertical frames 1, and at this time, the installation part 21 is inserted between the pair of vertical frames 1, and the cone nut 40 ) is inserted into the hole formed in the outer formwork 3, so that the tie bolt 10 is screwed to the female screw portion 33 of the shaft rod 30, and between the outer formwork 3 and the inner formwork 4 installed in this way concrete will be poured.

As shown in FIG. 4, a groove portion 34 is formed on the outer circumferential surface of the shaft rod 30 to which the cone nut 40 is coupled, and the groove portion 34 has a protrusion 41 formed on the inner circumferential surface of the cone nut 40. ) is inserted.

Therefore, the cone nut 40 maintains the same position by the protrusion 41 fixed to the groove 34 even if the outer cuff sheath 3 moves slightly toward the spacer due to the expansion of the concrete, and the shaft rod 30 Even when rotated, it remains fixed to the hole of the outer formwork (3).

In addition, one side of the wire 60 is fixed by a fixing bolt 61 fixed to the shaft rod 30, and the other side is drawn upward through the cutout 22, and the outer side of the bracket 20 is a metal material. A plurality of magnets 23 are coupled so that the in-washer 32 can be fixed in close contact with each other.

The spacer of the present invention configured as described above is installed on a formwork as shown in FIG. By being fixed to, it is possible to rotate the shaft bar 30 by the lifting of the lifting member 70.

At the lower side of the elevating member 70, a plurality of vertical mounts 71 are coupled at intervals left and right, and a support 72 is coupled to the vertical mounts 71 at intervals up and down. A plurality of spacers are installed vertically, left and right so that the brackets 20 are in close contact with the pair of vertical frames 1, and the wire 60 drawn out through the cutout 22 is a support located on the upper side of the spacer ( 72), the elevating member 70 is moved up and down by a tower crane, and a plurality of spacers are simultaneously operated.

Therefore, as shown in FIG. 6, when the curing of concrete is completed by the formwork 3 and the elevating member 70 rises, the shaft rod 30 rotates counterclockwise due to the rise (pulled) of the wire 60. While rotating, the mainspring 50 is compressed, and accordingly, the female screw portion 33 of the shaft bar 30 and the tie bolt 10 are separated, and the shaft bar 30 gradually moves to the outside of the mold 3.

On the other hand, as shown in FIGS. 7 and 8, when the elevating member 70 is lowered, the mainspring 50 expands due to the loose wire 60, and accordingly, the shaft rod 30 rotates counterclockwise in the clockwise direction. While moving inward, the shaft bar 30 is fixed in place while the washer 32 is in close contact with the magnet 23, and the shaft bar 30 is switched to the tie bolt 10 and the standby state.

Thereafter, the operator couples the tie bolts 10 to each of the shaft rods 30 waiting for coupling, resulting in a state as shown in FIG. 3, and when the concrete is cured again, the lifting member 70 is raised to perform repetitive work. can

As another embodiment of the present invention, as shown in FIG. 9, a guide groove 38 penetrating up and down is formed in the longitudinal direction of the shaft rod 30a, and the inner side of the mainspring 50 is formed in the guide groove 38. By bending the end and inserting it, the shaft rod 30a may be configured to move back and forth.

This configuration has the advantage of significantly reducing assembly cost and product cost because there is no need to form a seating portion 35 or to combine a separate fixing member 36 .

Therefore, the detachable structure of the spacer for formwork according to the present invention is configured to separate the tie bolt 10 by rotating the shaft rods 30 and 30a by the manipulation of the wire 60 and the elastic force of the spring spring 50 This eliminates the need for the worker to release the spacer from the outer wall of the high-rise building, thereby preventing safety accidents due to falls.

In addition, by being configured to dismantle a plurality of spacers at the same time by an operation of lifting the elevating member 70 using a tower crane, it is possible to drastically shorten the working time, which has a more economical effect.

10: tie bolt 20: bracket
21: installation part 22: incision
23: magnet 30, 30a: shaft rod
31: head 32: washer
33: female screw part 34: groove part
35: seating part 36: fixing member
37, 38: guide groove 40: cone nut
41: protrusion 50: spring spring
51, 61: fixing bolt 60: wire
70: elevating member 71: vertical mount
72: support

Claims (5)

A female screw part 33 is formed on the inner circumferential surface so that the tie bolt 10 can be screwed into the shaft rod 30 (30a) to which the cone nut 40 is coupled, and a tower on the outer circumference of the shaft rod 30 (30a). The wire 60 fixed to the elevating member 70 that moves up and down by the crane and the spiral spring 50 configured to exert elastic force by compression and expansion are combined.
When the lifting member 70 rises, the main spring 50 is compressed due to the pulling of the wire 60, and the tie bolt 10 is separated while the shaft rods 30 and 30a rotate counterclockwise,
When the elevating member 70 is lowered, the mainspring 50 is expanded by the loose wire 60, and the shaft rods 30 and 30a rotate counterclockwise in a clockwise direction and are in a standby state for coupling with the tie bolt 10. Detachable structure of the formwork spacing, characterized in that the conversion.
According to claim 1,
A plurality of vertical mounts 71 are coupled to the elevating member 70 at intervals left and right, and support portions 72 to which wires 60 are connected are coupled to the vertical mounts 71 at intervals vertically. The detachable structure of the spacer for formwork characterized by.
According to claim 1,
The shaft rods 30 and 30a are installed through the bracket 20 and the installation portion 21, and the washer 32 is coupled to the shaft rods 30 and 30a drawn out of the bracket 20, , Detachable structure of the spacer for formwork, characterized in that the cone nut 40 is rotatably coupled to the shaft rod 30 (30a) drawn out to the installation portion 21.
According to claim 1,
One side of the wire 60 is fixed to the shaft rod 30 (30a), and the other side of the wire 60 is fixed to the support part 72 of the elevating member 70. Removable structure of the spacer for formwork, characterized in that .
According to claim 1,
One side of the mainspring 50 is inserted into the guide groove 37 formed in the fixing member 36 coupled to the shaft rod 30 or inserted into the guide groove 38 formed in the shaft rod 30a,
The detachable structure of the spacer for formwork, characterized in that the other side of the main spring (50) is fixed to the installation part (21).

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